MEDIUM size, neck: 15" - 18" chest: 20" - 28" Soft, stretchy, and resilient. This cushioned, lightweight dog harness has three attachment points to suit different walk styles. Plus, adjustable straps at the neck, chest, and back accommodate different sizes, and make it a breeze for pet parents to slip it on and off. Pre owned - is dirty with stains.. have not tried to clean. Still in amazing working condition, no rips or tears.